Hdu 1003 Max Sum

#include <stdio.h>
int a,b[100001],sum;
int main()
{
    int t,i,n,j,k,a1,b1,max;
    scanf("%d",&t);
    for(j=1;j<=t;j++)
    {
        scanf("%d",&n);
        max=-9999;sum=0;
        for(i=k=1;i<=n;i++)
        {
            scanf("%d",&a); sum+=a;
                if(max<sum)
                {
                    max=sum;
                    b1=i;a1=k;
                }
                if(sum<0)
                {sum=0;
                k=i+1;
                }       
        }       
        printf("Case %d:\n",j);
        printf("%d %d %d\n",max,a1,b1);       
        if(j!=t)printf("\n");
    }
    return 0;
}